Stripper-blade for tobacco-stemming machines.



G. P. BCKART. STRIPPER BLADE FOR TOBACCO STEMMING MACHINES.

APPLICATION FILED DEC. 9, 1912.

Patented Sept. 15,1914.

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GERGE F. ECKART, OE CHICAGO, ILLINOIS, ASSIGNOR TO AUTOMATIC STEMMER l v COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

STRIPPER-BLADE FOR TOBACCO-STEMMING MACHINES.

Specification or' Letters Patent.

Patented Sept. 15, 1914.

Application led December 9, 1912. Serial No. 735,726.

citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Stripper-Blades for Tobacco-Stemming Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has for its object to provide novel'and efficient stripper disks for tobacco stemming machines of the class described and claimed in Letters Patent No. 1032192 granted to me July 9, 1912, and which may be employed in other machines operating on the same general principles:

The particular object of the present invention is to provide renewable shearing edges for the notches or recesses in the stripper disks in which the stem of the leaf is embraced and through which the same is drawn to shear the lamina of the leaf from said stem. By means of my invention sharp shearing edges may be maintained onL the stripper disks at very small expense. y

The invention consists in the features of construction and combinations of parts hereinafter fully described and particularly claimed.

In the accompanying drawings illustrating the invention: Figure -lis a View in elevation of a pair of stripper disks constructed in accordance with my invention. Fig. -2 is a sectional view of the same on the line 2-2 of Fig. -1-, showing also a pair of grippers for engaging the stem of a leaf to draw the same through the opening formed by the meeting of two opposed recesses in the disks; a leaf being stripped Fig. #3- is a fragmentary detail sectional view on the line 3 3 of Fig. -1-.

In tobacco stemming machines of the type shown and described in the aforesaid Letters Patent, a pair of disks is employed which rotate in opposite directions uponr parallel axes, said disks beingof such diameter and their axes of rotation so disposed relatively to each other as to cause the edge portions of said disks to overlap. Each of said disks is provided iii its periphery with a plurality of V-shaped recessesl which, during rotation of said disks,

are adapted to become opposed at the point at which said disks overlap thereby forming between the same an opening through which the stem of the leaf to be stripped is adapted to pass. Means are provided for engaging the stem of the leaf and drawing the saine through said opening, the edges of the latter adapted to shear the lamina from the stem as the latter passes' through said opening.

It is wellsknown that tobacco leaves at the time they are being stripped carry more or less sand or gritty earth particles. These particles act to grind away the edges of the recessesin the disks with considerable rapidity and it has been found necessary, therefore, to renew said disks at relatively frequent intervals and at considerable expense.

The present invention is intended to obviate the necessity for renewing the disks by providing as a means for maintaining the shearing edges of the recesses therein sharp,'a pair of members mounted upon said disks and having recesses therein adapted to register with the recesses in the disks,eacli of said members being provided With a large number of said recesses and adapted to be adjusted on the disks from time to time to bring 4new recesses into register with the recesses of the disk as the edges of those previously in register wear away dull. Y To this end each of the disks A and B rotating about axes C and D respectively, and which are provided in their peripheries with recesses E and F respectively, are countersunk or dished concentric with their respective axes of rotation, the dished portion extending radially outwardlybeyond the innermost portions` of said recesses E and F. Those portions of said recesses E and F which extend beyond the periphery of the dished portion G of the disk are adapted, during rotation of said disks, to become opposed, as shown in the middle of Figs. fland -2-, to form the openingV and become H through which the` stem of a leaf to be f stripped is adapted to pass. Therespective disks A and B are so disposed that their opposed faces contact with each other during rotation thereof. Those portions of said recessesboidering the opening H are subi their functions. To overcome this difficulty I provide Within the said dished portion G of each of said disks A and B a member I which, in General appearance, is substantially identical With a circular saW, being provided With a serrated circumferential edge having a relatively large number of V-shaped recesses J therein. The number of said recesses J in each of said disks I is a multiple of the number of recesses E and F in said disks and these are equally spaced around the periphery of said mem ber. In the instance illustrated each of said disks is provided With four recesses and each of the members J is, therefore, provided With a multiple of four recesses J. Four of the latter register with the four recesses in the disk, and by rotating one of the members I relatively to the disk carrying the same a distance equal to the arc of the circle separating tivo contiguous recesses J, a different set of four of the latter will be brought into register With said recesses of said disk. The said members I are preferably riveted to the disks A and B, a plurality of rivets K being employed for this purpose. Each of said members I is provided with a relatively large number of rivet holes While the disks may be provided With a less number and only a feW rivets need be used for securing said parts to each other. These rivets may be removed from time to time as it is desired to bring new recesses J into register With the recesses E and F of the disks and then replaced With new rivets. rIhis has been found to be the safest and most convenient method of effec-ting an adjustment especially as the latter is not required at very frequent intervals, that is to say, probably not oftener than once in two Weeks or a month depending upon the cleanliness of the tobacco being stripped. The dished portions of the disks in which said members I are contained are preferably annular beginning at a given distance from the disk center and terminating inwardly of its circumferential edge; the member I being provided with a central opening L in which the middle or central portion of the disk A or B is received.

The respective dished portions G of the disks A and B have their concave faces 0pposed to each other so that the said members I contained in said dished portions and which are of the thickness ofthe depth of the dished portion are in contact with each other at those points in their edges contiguous to the opposed notches or recesses J therein which border the opening I-I.

In order that the shearing edges of the recesses J may best perform their intended function, the inner ends of the recesses E and F are enlarged by cutting away the edges thereof as shown, at L, the edges of changed to best adapt the same to the proper performance of their function.

I claim as my invention:

l. In a stripper disk for tobacco stemming machines having a recess in Which the stem of the leaf is adapted to be received andA through which it is adapted to be drawnfor separating the lamina therefrom, a member removably secured to said disk and provided with a recess having sharp edged Walls adapted to shear the lamina from the stem of the leaf, said recesses of said disk and said member being relatively so disposed that the sharp edges of the latter are presented to the leaf received in and drawn through said recesses.

2. In a stripper disk for tobacco stemming machines having a recess in which the stem of the leaf is adapted to be received and through Which it is adapted to be drawn for separating the lamina therefrom, means removably secured to said disk and' having sharp shear edges bordering the edges of said recess of said disk and adapted to shear the lamina from the stem ofthe leaf as said stem is drawn through said recess.

In a tobacco stemming machine having a pair of stripper disks provided in their edges with recesses adapted to receive the stem of a leaf and to become opposed to form an opening through which said stem is adapted to be drawn, means removably secured to said disks presenting sharp shear edges bordering the recesses therein and adapted, when said stem is drawn through the opening formed by said recesses to strip the lamina from the leaf.

t. In a tobacco stemming machine, a pair of stripper disks adapted to rotate in opposite direction on parallel axes and overlapping each other along a part of their peripheral portions, said disks each lprovided With an equal number of equally spaced peripheral recesses adapted to become successively opposed to form openings through Which the stem of the leaf to be stripped is adapted to pass, a member removably secured to each disk provided with peripheral recesses having sharp shear Y edges arranged to border the edges of the recesses in said disks and adapted, When said stem is drawn through said opening, to separatethe lamina therefrom.

5. In a tobacco stemming machine, a pair f stripper disks adapted to rotate in opposite direction on parallel axes andv overlapping each other along'a part of their peripheral portions, said disks each provided with an equal number of equally A spaced peripheral recesses adapted to become successively opposed to form openings through which the stem of theV leaf to be stripped is adapted to pass, a member removably secured to each disk provided with peripheral recesses, of a number constituting a multiple of the number of recesses in each disk, said recesses of said member having sharp shear edges and relatively arranged so that said edges of the recesses therein registering with the recesses of the disk border the latter and separate the lamina from the stem as the latter is drawn through said opening.

6. A stripper device for tobacco stemming machines including a circular rotatable disk provided with peripheral recesses adapted to receive the stem of a leaf, said recesses disposed equidistant from each other about the periphery of said disk, a member reinovably mounted on said disk concentric therewith and provided with edge recesses of a number constituting a multiple of the number of said recesses in said disk and adapted to be disposed so that the edges of a set of said recesses of said member border the edges of the recesses of said disk, said edges of said member being sharp for shearing the lamina from the stem as the latter is drawn through said recesses in the direction of the axis of rotation of said disk.

7. A stripper disk for tobacco stemming machines having a plurality of peripheral recesses equidistant from each other and of equal depth and dished to provide an oset portion in its body, said recesses extending into said dished portion, a member equal in thickness to the depth of saidV dished portion removably secured therein and provided with peripheral recesses corresponding in relative location with the recesses of said disk, said recesses of said member having sharp shear edges adapted to border the recesses of said disk, for the purpose described.

8. A stripper disk for tobacco stemming machines dished to provide an oset portion in its body having a set of peripheral recesses equidistant from each other and of equal depth, said recesses extending into said dished portion', a member substantially equal in thickness to the depth of said dished portion removably secured therein and provided with peripheral recesses in sets, each set of recesses in said member corresponding in relative location with the disk-recesses, and adapted to be brought into register with the latter and having sharp edges bordering the edges of said disk-recesses, for the purpose set forth.

9. A stripper device for tobacco stemming machines including a circular rotatable disk having a set of peripheral recesses through which the stems of leaves to be stripped are adapted to be drawn, a circular member having a plurality of sets of correspondiiigly relatively positioned peripheral recesses removably mounted on said disk concentric therewith, so that one set of recesses in said circular member registers with the set of recesses in said disk, said recesses of said member presenting sharp edges for shearing the lamina of the leaf from the stem and said member adapted to be shifted in position on said disk as the sharp edges of one set of its recesses are dulled to present another set thereof.

10. A device of the kind specified including two concentric disks of different diameters removably secured together, the larger disk having a set of equidistantly disposed peripheral recesses terminating inwardly of the periphery of the smaller disk, the latter provided with a plurality of sets of correspondingly positioned peripheral recesses adapted to be successively brought into register with the recesses of the larger disk and presenting sharp edges for the purpose set forth.

11. A device of the kind specified including two concentric disks of diiferent diameters removably secured together, thelarger disk having a set of equidistantly disposed peripheral recesses terminating inwardly o f the plurality of sets of correspondingly positioned peripheral recesses adapted to be successively brought into register with the recesses of the larger disk and presenting sharp edges for the purpose set forth.

In testimony whereof I have signed my name in presence of two subscribing witnesses.

GEORGE F. ECKART.

, Witnesses:

ELMER BRADER, E. BENTLEY HAMILTON.

Copies of this patent may be obtainedfor ve cents each, by addressing the t' Commissioner of Patents,

Washington, I). C. 

